An Iraqi teen on trial over the Parsons Green bomb is alleged to have used a prize he won at school to buy chemicals to build the improvised device.

Ahmed Hassan Mohammed Ali has been charged with attempted murder and using the chemical compound TATP to cause an explosion that was likely to endanger life.

The court was told that Hassan "intended this to be a lethal attack".

In June 2017 Hassan won a £20 Amazon voucher from Brooklands College in Surrey for being "student of the year".

The jury heard that he used this prize to purchase hydrogen peroxide which he allegedly used to assemble his homemade bomb.

Thirty people were injured after the device partially detonated during rush hour last September in a Tube train at Parsons Green station.

The 18-year-old is alleged to have travelled from his home in Sunbury, Surrey, to Wimbledon station and used the privacy of a toilet to set the timer on the explosive device.

He then boarded the District Line once again, getting off at Putney Bridge empty handed, one stop before Parsons Green.

The court heard Hassan had packed the bomb - which was within a plastic builders bucket inside a Lidl plastic bag - with 2.2kg of screwdrivers, knives and nails to cause "maximum carnage".

Passenger Jelena Semenjuk described "a massive bang" followed by shards of glass flying through the air and then flames.

Another passenger, Aimee Colville told the jury she could "smell herself burning" and saw her hair was on fire.

Prosecutor Alison Morgan told the court it was "a matter of luck" that the volatile chemical compound did not fully explode and kill people.

Hassan had arrived in Britain in the back of a lorry via the Channel Tunnel in October 2015.

When claiming asylum, he told the Home Office he had fled the war in Iraq, and said that his uncle and brother would have been killed by IS if he had refused to leave.

Claiming to have been trained with 1,000 people until Iraqi soldiers came into IS territory, he told officials he was trained "how to kill" during "religious-based" training.

While police say he "accepted that he was responsible" for the bomb when he was first arrested, he has since refused to give any details about why he allegedly created and detonated the improvised device.